Heterocyclylbenzonitriles

Abstract

The invention relates to new heterocyclylbenzonitriles of the general formula (I) ##STR1## in which R 1 , R 2 , R 3 and Het have the meanings given in the description, new processes and new intermediate products for their preparation and their use as herbicides.

We claim: 
     
       1. An aminobenzonitrile of formula (III) ##STR72## in which R 1  represents hydrogen or halogen, R 2  represents formyl, or represents alkenyl, alkinyl, alkoxy, alkylcarbonyl, alkoxycarbonyl or alkylsulphonyl having in each case 1 to 6 carbon atoms and which may be substituted in each case by halogen, cyano, C 1  -C 4  -alkoxy or C 1  -C 4  -alkoxy-carbonyl, or represents cycloalkyl, cycloalkylalkyl, cycloalkylcarbonyl or cycloalkylsulphonyl having 3 to 6 carbon atoms in the individual cycloalkyl moieties and, which may have 1 to 4 carbon atoms in the alkyl moiety and which may be substituted in each case by halogen, cyano or C 1  -C 4  -alkyl, or represents phenylmethyl, phenylcarbonyl, naphthylcarbonyl, phenylmethylcarbonyl, phenoxycarbonyl, phenylsulphonyl, naphthylsulfonyl or phenylmethylsulphonyl, which may be substituted in each case by halogen, cyano, C 1  -C 1  -alkyl, C 1  -C 1  -halogenoalkyl, C 1  -C 4  -alkoxy, C 1  -C 4  -halogenoalkoxy or C 1  -C 4  -alkoxycarbonyl,   R 3  represents alkyl having in each case 1 to 10 carbon atoms and which may be substituted in each case by halogen, cyano or C 1  -C 4  -alkoxy, or represents cycloalkyl having 3 to 8 carbon atoms and which may be substituted in each case by halogen, cyano or C 1  -C 4  -alkyl, or represents carbocyclic aryl or carbocyclic arylalkyl having 6 or 10 carbon atoms in the aryl moiety and 1 to 4 carbon atoms in the alkyl moiety and which may be substituted in each case by halogen, cyano, nitro, carboxyl or carbamoyl, by C 1  -C 4  -alkyl, C 1  -C 4  -alkoxy, C 1  -C 4  -alkylthio, C 1  -C 4  -alkylsulphinyl or C 1  -C 4  -alkylsulphonyl which may be substituted in each case by fluorine or chlorine, or by dimethylaminosulphonyl, diethylaminosulphonyl, dimethylaminocarbonyl or diethylaminocarbonyl, or by C 1  -C 4  -alkoxy-carbonyl which may be substituted in each case by halogen, methoxy or ethoxy, or by phenyl, phenyloxy or phenylthio which may be substituted in each case by halogen, cyano, methyl, methoxy, trifluoromethyl or trifluoromethoxy.